12. ..................................................on Sundays.

a. He gets up always late b. He always gets up late

c. Does he always get up late d. He gets always up late

13. Lan is very good at languages. She .................................two languages very well.

a. speaks b. is speaking c. spoke d. was speaking

14. I ....................at six o'clock, but ......... to be up by five.

a. normally get up/ I have sometimes b. normally get up/ sometimes I have

c. get normally up/ sometimes I have d. get normally up/ I sometimes have

15. It ………………….. very much in the summer in our country.

a. not rains b. don’t rain c. doesn’t rain d. isn’t raining

16. Mike .....................................me one hour ago.

a. phoned b. was phoning c. had phoned d. has phoned

17. Last year they .....................................22 million TV set.

a. were selling b. had sold c. has sold d. sold

18. Marie Curie ........................................a Nobel Prize in Chemistry in 1911.

a. awarded b. was awarded c. had awarded d. had been awarded

19. It’s at least a month since ................................Tom.

a. I last seen b. I last see c. I have last seen d. I last saw

20. Galileo .................................his first telescope in 1609.

a. builds b. built c. has built d. had built

1. John isn’t contented with his present salary.

a. excited about b. satisfied with c. disappointed about d. interested in

2. Doing homework is a student’s daily routine.

a. thing one rarely does b. thing one regularly does

c. thing one occasionally does d. thing one never does

3. She purchased a number of shares in the company.

a. invested b. sold c. exchanged d. bought

4. We had a nice chat over a cup of tea.

a. formal talk b. informal talk c. serious talk d. long talk

5. She’s upstairs getting ready to go out.

a. dressing b. determining c. planning d. preparing

6. People feel the area in panic.

a. excitement b. fear c. gust d. danger

7. We seldom set each other anymore.

a. sometimes b. occasionally c. frequently d. rarely

8. It was a difficult tune, but we never gave up hope.

a. stopped b. continued c. had d. offered

9. We………..the seedlings into peaty soil.

a. take b. plough c. raise d. transplant

10. Before the plane takes off, passengers must ………..their seat belts.

a. fasten b. flee c. emit d. unbind

11. John ...........................................tennis once or twice a week.

a. usually play b. is usually playingc. have usually played d. us

Một nguyên tử X có tổng số hạt p, n, e là 54. Trong đó có 17 hạt mang điện tích âm. Tính số khối của nguyên tử.

Canxi trong hạt nhân có số hạt mang điện bằng số hạt không mang điện và bằng 2

Cần bao nhiêu gam vôi sống để trung hòa hết 100ml dd HCl 1M